While you're at it, add a new CSS declaration to control the width of the tooltip content so it doesn't end up with a scrollbar.
与此同时，添加一个新CSS声明以控制工具提示内容的宽度，从而不需要再用到滚动条。
This has the further advantage that the scrollbar thumb does not change size over time nor move without user input, making it easier for a user to interact with the scroll bar control.
其进一步的优点在于：滚动条滑动块不随时间改变尺寸，在无用户输入的情况下也不移动，使得用户与滚动条控制部件交互作用更容易。
This has the further advantage that the scrollbar thumb does not change size over time nor move without user input, making it easier for a user to interact with the scroll bar control.
其进一步的优点在于：滚动条滑动块不随时间改变尺寸，在无用户输入的情况下也不移动，使得用户与滚动条控制部件交互作用更容易。
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